Physical Sciences and Mathematics Commons^™

An Extremely Optically Dim Tidal Feature In The Gas-Rich Interacting Galaxy Group Ngc 871/Ngc 876/Ngc 877, K. Lee-Waddell, K. Spekkens, J.-C. Cuillandre, John Cannon, M. Haynes, J. Sick, P. Chandra, N. Patra, S. Stierwalt, R. Giovanelli

John Cannon

No abstract provided.

Learning Parametric Dictionaries For Signals On Graphs, D. Thanou, David Shuman, P. Frossard

David I Shuman

No abstract provided.

Distance Determinations To Shield Galaxies From Hst Imaging, Kristen Mcquinn, John Cannon, Andrew Dolphin, Evan Skillman, John Salzer, Martha Haynes, Elizabeth Adams, Ian Cave, Ed Elson, Riccardo Giovanelli, Juergen Ott, Amelie Saintonge

John Cannon

No abstract provided.

The Rarity Of Dust In Metal Poor Galaxies, David Fisher, Alberto Bolatto, Rodrigo Herrera-Camus, Bruce Draine, Jessica Donaldson, Fabian Walter, Karin Sandstrom, Adam Leroy, John Cannon, Karl Gordon

John Cannon

Preprint in ArXiV is titled - "Dust May be More Rare Than Expected in Metal Poor Galaxies"

Maker-Breaker Games On Random Geometric Graphs, Andrew Beveridge, A. Dudek, A. Frieze, T. Muller, M. Stojacovik

Andrew Beveridge

No abstract provided.

Carrier Lifetime Enhancement In A Tellurium Nanowire/Pedot:Pss Nanocomposite By Sulfur Passivation, James Heyman, Ayaskanta Sahu, Nelson Coates, Brittany Ehmann, Jeffery Urban

James Heyman

No abstract provided.

The Lyman-Alpha Reference Sample: I. Survey Outline And First Results For Markarian 259, G. Ostlin, M. Hayes, F. Duval, A. Sandberg, T. Rivera-Thorsen, T. Marquart, I. Orlitova, A. Adamo, J. Melinder, L. Guaita, H. Atek, John Cannon, P. Gruyters, E. Herenz, D. Kunth, P. Laursen, J. Mas-Hesse, G. Micheva, H. Oti-Floranes, S. Pardy, M. Roth, D. Schaerer, A. Verhamme

John Cannon

No abstract provided.

Worlds Without End: The Many Lives Of The Multiverse, Mary-Jane Rubenstein

Mary-Jane Rubenstein

Worlds without End explores the recent proliferation of "multiverse" cosmologies, which imagine our universe as just one of a vast, even infinite, number of others. While this idea has been the stuff of philosophy, religion, and literature for millennia, it is now under consideration as a scientific hypothesis, with wildly different models emerging from the fields of cosmology, quantum mechanics, and string theory. Beginning with the Atomistic and Stoic philosophies of ancient Greece, this book assembles a genealogy of the multiverse, seeking to map contemporary models in relation to their forerunners, and to ask why the proposition has become such …

The Lyman Alpha Reference Sample: Ii. Hst Imaging Results, Integrated Properties And Trends, Matthew Hayes, Goran Ostlin, Florent Duval, Andreas Sandberg, Lucia Guaita, Jens Melinder, Angela Adamo, Daniel Schaerer, Anne Verhamme, Ivana Orlitova, J. Mas-Hesse, John Cannon, Hakim Atek, Daniel Kunth, Peter Laursen, Hector Ot-Floranes, Stephen Pardy, Thøger Rivera-Thorsen, E. Herenz

John Cannon

No abstract provided.

Alfalfa Discovery Of The Nearby Gas-Rich Dwarf Galaxy Leo P. V. Neutral Gas Dynamics And Kinematics, E. Bernstein-Cooper, John Cannon, E. Elson, S. Warren, J. Chengalur, E. Skillman, E. Adams, A. Bolatto, R. Giovanelli, M. Haynes, K. Mcquinn, S. Pardy, K. Rhode, J. Salzer

John Cannon

No abstract provided.

The Evolution Of Billfish, Andrew Blitman

Andrew Blitman

No abstract provided.

Polynomials That Have Golden Ratio Zeros, Tian-Xiao He, Jack Maier, Kurt Vanness

Tian-Xiao He

When the golden ratio and its conjugate are zeros to a polynomial, two of the coefficients are functions of the Fibonacci sequence in terms of the other coefficients, which characterize the polynomial completely. These functions are used to derive some Fn, Ln, and golden ratio identities. In many cases, this is generalized to the Lucas sequences Un and Vn, with an associated quadratic root pair. Horadam sequences are produced in the series of linear and constant coefficients of the series of polynomials Having ra and rb zeros when all of the other coefficients are equal.

A Model Averaging Approach For High-Dimensional Regression, Tomohiro Ando, Ker-Chau Li

Tomohiro Ando

No abstract provided.

Approximate Bayesian Computation In State Space Models, Gael Martin, Brendan Mccabe, Christian Robert, Worapree Ole Maneesoonthorn

Worapree Ole Maneesoonthorn

A new approach to inference in state space models is proposed, based on approximate Bayesian computation (ABC). ABC avoids evaluation of the likelihood function by matching observed summary statistics with statistics computed from data simulated from the true process; exact inference being feasible only if the statistics are sufficient. With finite sample sufficiency unattainable in the state space setting, we seek asymptotic sufficiency via the maximum likelihood estimator (MLE) of the parameters of an auxiliary model. We prove that this auxiliary model-based approach achieves Bayesian consistency, and that - in a precise limiting sense - the proximity to (asymptotic) sufficiency …

On The Minimal Order Of K-Cop-Win Graphs, W. Baird, Andrew Beveridge, A. Bonato, P. Codenotti, J. Maccauley, A. Maurer, S. Valeva

Andrew Beveridge

No abstract provided.

Comparison Of Methods For Estimating The Effect Of Salvage Therapy In Prostate Cancer When Treatment Is Given By Indication., Jeremy Taylor, Jincheng Shen, Edward Kennedy, Lu Wang, Douglas Schaubel

Edward H. Kennedy

For patients who were previously treated for prostate cancer, salvage hormone therapy is frequently given when the longitudinal marker prostate-specific antigen begins to rise during follow-up. Because the treatment is given by indication, estimating the effect of the hormone therapy is challenging. In a previous paper we described two methods for estimating the treatment effect, called two-stage and sequential stratification. The two-stage method involved modeling the longitudinal and survival data. The sequential stratification method involves contrasts within matched sets of people, where each matched set includes people who did and did not receive hormone therapy. In this paper, we evaluate …

Fracture Toughness Of The Sidewall Fluorinated Carbon Nanotube Epoxy Interface, Nima Rahbar, Yogeeswaran Ganesan, Hossein Salahshoor, Cheng Peng, Valery Khabashesku, Jiangnan Zhang, Avery Cate, Jun Lou

Nima Rahbar

The effects of carbon nanotube (CNT) sidewall fluorination on the interface toughness of the CNT epoxy interface have been comprehensively investigated. Nanoscale quantitative single-CNT pull-out experiments have been conducted on individual fluorinated CNTs embedded in an epoxy matrix, in situ, within a scanning electron microscope (SEM) using an InSEM® nanoindenter assisted micro-device. Equations that were derived using a continuum fracture mechanics model have been applied to compute the interfacial fracture energy values for the system. The interfacial fracture energy values have also been independently computed by modeling the fluorinated graphene-epoxy interface using molecular dynamics simulations and adhesion mechanisms have been …

Discovery Of A Gas-Rich Companion To The Extremely Metal-Poor Galaxy Ddo 68, John Cannon, M. Johnson, K. Mcquinn, E. Alfvin, J. Bailin, H. Ford, L. Girardi, A. Hirschauer, S. Janowiecki, J. Salzer, A. Van Sistine, A. Dolphin, E. Elson, B. Koribalski, P. Marigo, J. Rosenberg, P. Rosenfield, E. Silkman, A. Venkatesan, S. Warren

John Cannon

No abstract provided.

Insights Into The Cation Permeation Pathway Of Channelrhodopsin-2, Robert Dempski, Ryan Richards

Robert E. Dempski

Channelrhodopsin-2 (ChR2) is a light-activated, non-selective cation channel endogenous to the green algae Chlamydomonas reinhardtii. The unique properties of ChR2 have made it a useful tool in the field of optogenetics. However, the mechanism of ion conductance is not well resolved. Elucidation of the crystal structure of the channelrhodopsin chimera C1C2 has provided structural insight on the putative ChR2 ion conductance pathway. However, it is not clear how the chimeric structure correlates to ChR2 function.

Ultrafast Thz Faraday Rotation In Graphene, James Heyman, R. Foo Kune, B. Alebachew, M. Nguyen, J. Robinson

James Heyman

No abstract provided.

Purification Of An Inducible Dnase From A Thermophilic Fungus, Kyle Landry, Andrea Vu, Robert Levin

Kyle S Landry

Purification And Characterization Of Iso-Ribonucleases From A Novel Thermophilic Fungus, Kyle Landry, Robert Levin

Kyle S Landry

Modeling The Longitudinality Of User Acceptance Of Technology With An Evidence-Adaptive Clinical Decision Support System, Michael P. Johnson Jr., Kai Zheng, Rema Padman

Michael P. Johnson

This paper presents multiple innovations associated with an electronic health record system developed to support evidence-based medicine practice, and highlights a new construct, based on the technology acceptance model, to explain end users' acceptance of this technology through a lens of continuous behavioral adaptation and change. We show that this new conceptualization of technology acceptance reveals a richer level of detail of the developmental course whereby individuals adjust their behavior gradually to assimilate technology use. We also show that traditional models such as technology acceptance model (TAM) are not capable of delineating this longitudinal behavioral development process. Our TAM-derived analysis …

Targeted Maximum Likelihood Estimation Of Natural Direct Effect, Wenjing Zheng, Mark Van Der Laan

Wenjing Zheng

In many causal inference problems, one is interested in the direct causal effect of an exposure on an outcome of interest that is not mediated by certain intermediate variables. Robins and Greenland (1992) and Pearl (2000) formalized the definition of two types of direct effects (natural and controlled) under the counterfactual framework. Since then, identifiability conditions for these effects have been studied extensively. By contrast, considerably fewer efforts have been invested in the estimation problem of the natural direct effect. In this article, we propose a semiparametric efficient, multiply robust estimator for the natural direct effect of a binary treatment …

Prescribed Fire Effects On Resource Selection By Cattle In Mesic Sagebrush Steppe. Part 1: Spring Grazing, Patrick Clark, Jaechoul Lee, Kyungduk Ko, Ryan Nielson, Douglas Johnson, David Ganskopp, Joe Chigbrow, Frederick Pierson, Stuart Hardegree

Kyungduk Ko

Prescribed fire is commonly applied world-wide as a tool for enhancing habitats and altering resource-selection patterns of grazing animals. A scientific basis for this practice has been established in some ecosystems but its efficacy has not been rigorously evaluated on mesic sagebrush steppe. Beginning in 2003, resource-selection patterns of beef cows were investigated using global positioning system (GPS) collars for 2 years before and for 5 years after a fall prescribed burn was applied to mesic sagebrush steppe in the Owyhee Mountains of southwestern Idaho, USA. Resource-selection functions (RSF) developed from these data indicated cattle selected for lightly to moderately …

Disk-Outflow Models As Applied To High Mass Star Forming Regions Through Methanol And Water Maser Observations, Hontas Farmer

Hontas F Farmer

As the recent publication by Breen et al (2013) found Class II methanol masers are exclusively associated with high mass star forming regions. Based on the positions of the Class I and II methanol and H2O masers, UC H II regions and 4.5 μm infrared sources, and the center velocities (vLSR) of the Class I methanol and H2O masers, compared to the vLSR of the Class II methanol masers, we propose three disk-outflow models that may be traced by methanol masers. In all three models, we have located the Class II methanol maser near the protostar, and the Class I …

Diatom Community Response To Climate Variability Over The Past 37,000 Years In The Sub-Tropics Of The Southern Hemisphere, Sarah Hembrow, Kathryn Taffs, Pia Atahan, Jeffrey Parr, Atun Zawadzki, Henk Heijnis

Jeffrey Parr

Climate change is impacting global surface water resources, increasing the need for a deeper understanding of the interaction between climate and biological diversity. This is particularly the case in the Southern Hemisphere sub-tropics, where little information exists on the aquatic biota response to climate variations. Palaeolimnological techniques, in particular the use of diatoms, are well established and can significantly contribute to the understanding of climatic variability and the impacts that change in climate have on aquatic ecosystems. A sediment core from Lake McKenzie, Fraser Island (Australia), was used to investigate interactions between climate influences and aquatic ecosystems. This study utilises …

Occluded C In Rice Phytoliths: Implications To Biogeochemical Carbon Sequestration, Zimin Li, Zhaoliang Song, Jeffrey Parr, Hailong Wang

Jeffrey Parr

Aims: Carbon (C) bio-sequestration within the phytoliths of plants, a mechanism of long-term biogeochemical C sequestration, may play a major role in the global C cycle and climate change. In this study, we explored the potential of C bio-sequestration within phytoliths produced in cultivated rice (Oryza sativa), a well known silicon accumulator.

Methods: The rice phytolith extraction was undertaken with microwave digestion procedures and the determination of occluded C in phytoliths was based on dissolution methods of phytolith-Si.

Results: Chemical analysis indicates that the phytolith-occluded C (PhytOC) contents of the different organs (leaf, stem, sheath and grains) on …

Synthesis Of Novel Sugar Diamino Acids, M Thillakan, A Katsifis, D Skropeta

Danielle Skropeta

Sugar amino acids (SAAs) are found in nature as good construction elements for the preparation of peptide mimetics and oiigosaccharides in drug design and development. The synthesis of SAAs is readily accomplished in few steps and more than 40 SAAs have been synthesised to date.2 Sugar amino acids with an additional amino group, the sugar diamino acid (SDAs) would represent a useful expansion to the library of SAAs available because one of the amino group and carboxylic acid is available for peptide coupling and the another amino/azide group allow to do further derivatisation via peptide or click chemistry such as …

Exploring Marine Resources For New Pharmaceutical Applications, Danielle Skropeta

Danielle Skropeta

No abstract provided.